The Sony Alpha a99 II is a full-frame A-Mount DSLR camera. Key features include:
42.4MP full-frame CMOS sensor
Fast, accurate hybrid autofocus system
Five-axis image stabilization
Internal UHD 4K Video
You’ll want the Sony a77 II / a99 II Battery Grip – VG-C77AM.
The Sony a99 Battery Grip – VG-C99AM is not compatible with the a99 II.
You must use an SDXC memory card that’s 64GB or larger for internal HD-video capture in the XAVC-S codec.
You must use a U3 SDXC memory card for internal 100Mbps 4K capture.
Due to numerous compatibility issues, we strongly advise you against using UHS-II memory cards.